CVE-2026-26133
HIGHCVSS 7.1/10EPSS 0.43%
Last modified
CVE-2026-26133 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.. EPSS estimates a 0.43% chance of exploitation in the next 30 days.
Description
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | 365 Copilot | < 2.107.2 |
| Microsoft | 365 Copilot | < 16.0.19815.10000 |
| Microsoft | Edge | < 145.3800.99 |
| Microsoft | Excel | < 2.106.2 |
| Microsoft | Excel | < 16.0.19822.20038 |
| Microsoft | Loop | < 2.106 |
| Microsoft | Onenote | < 16.0.19725.20142 |
| Microsoft | Onenote | All versions |
| Microsoft | Outlook | < 5.2605.0 |
| Microsoft | Outlook | All versions |
| Microsoft | Power Bi | < 2.2.260210.21290750 |
| Microsoft | Power Bi | All versions |
| Microsoft | Powerpoint | < 2.106.2 |
| Microsoft | Powerpoint | < 16.0.19822.20038 |
| Microsoft | Teams | < 1.0.0.2026043102 |
| Microsoft | Teams | < 8.3.1 |
| Microsoft | Word | < 2.106.2 |
| Microsoft | Word | < 16.0.19822.20038 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-26133?
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
How severe is CVE-2026-26133?
CVE-2026-26133 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.
How do I fix CVE-2026-26133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-26127Out-of-bounds read in .NET allows an unauthorized attacker t…7.5
- CVE-2026-26128Improper authentication in Windows SMB Server allows an auth…7.8
- CVE-2026-26129Improper neutralization of special elements used in a comman…7.5
- CVE-2026-26130Allocation of resources without limits or throttling in ASP.…7.5
- CVE-2026-26131Incorrect default permissions in .NET allows an authorized a…7.8
- CVE-2026-26132Use after free in Windows Kernel allows an authorized attack…7.8
- CVE-2026-26134Integer overflow or wraparound in Microsoft Office allows an…7.8
- CVE-2026-26135Server-side request forgery (ssrf) in Azure Custom Locations…8.8
- CVE-2026-26136Improper neutralization of special elements used in a comman…7.5
- CVE-2026-26137Server-side request forgery (ssrf) in Microsoft Exchange all…9.9
- CVE-2026-26138Server-side request forgery (ssrf) in Microsoft Purview allo…10
- CVE-2026-26139Server-side request forgery (ssrf) in Microsoft Purview allo…8.6
Are you affected by CVE-2026-26133?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST